5.2 View.java

import java.lang.System;
import josx.platform.rcx.*;

/**
 * This program can be used
 * to test each sensor and motor
 * independently.
 * Button functionality:
 * VIEW:
 *   Select a port.
 * PRGM:
 *   Sensor ports:
 *   select input type/mode:
 *          touch/raw (0),
 *          touch/bool (1),
 *          touch/edge (2),
 *          touch/pulse (3),
 *          light/pct (4),
 *          rot/angle (5),
 *          temp/degc (6),
 *          temp/degf (7)
 *   Motor ports : select power.
 * RUN:
 *   Sensor ports:
 *          passive (0),
 *          active (1).
 *   Motor ports :
 *           float (0),
 *           forward (1),
 *           backward (2),
 *           brake (3).
 *   Press longer than 0.5s
 *   to terminate the program.
 * */

public class View
{
  static final int QUIT_DELAY = 500 /* ms */;

  static final PortView[] VIEWS =
    new PortView[] { SensorView.S1,
                     SensorView.S2,
                     SensorView.S3,
                     MotorView.A,
                     MotorView.B,
                     MotorView.C };

  static int iCurrentView;
  
  static void viewPressed()
  {
    iCurrentView++;
    if (iCurrentView >= VIEWS.length)
      iCurrentView = 0;
  }

  static void prgmPressed()
  {
    VIEWS[iCurrentView].prgmPressed();
  }

  static void runPressed()
  {
    VIEWS[iCurrentView].runPressed();
  }

  static void show()
  {
    LCD.clear();
    for( int i=0; i<VIEWS.length; i++){
      if( i == iCurrentView){
        VIEWS[i].showCursor();
        VIEWS[i].showValues();
      }
      VIEWS[i].showPort();
    }
    LCD.refresh();
  }

  public static void main (String[] arg)
  {
    boolean quit = false;
        Poll poller = new Poll();

    iCurrentView = 0;
    show();
        new Monitor().start();
    long t = 0;

    while( !quit)
    {
      int changed = 0;

          try {
        changed = poller.poll(Poll.ALL_BUTTONS, 0);
      } catch (InterruptedException ie) {
      }

      if ((changed & Poll.VIEW_MASK) != 0 &&
                       !Button.VIEW.isPressed())
        viewPressed();
      if ((changed & Poll.PRGM_MASK) != 0 &&
                       !Button.PRGM.isPressed())
        prgmPressed();
      if ((changed & Poll.RUN_MASK) != 0)
      {
        if (Button.RUN.isPressed())
          t = System.currentTimeMillis();
        else
        {
          if( (int)System.currentTimeMillis()-(int)t >
                            QUIT_DELAY)
            quit = true;
          else
            runPressed();
        }
          }

      show();
    }
    for( int i=0; i<VIEWS.length; i++){
      VIEWS[i].shutdown();
    }
  }

  static class Monitor extends Thread {
    public void run() {
      setDaemon(true);
      Poll poller = new Poll();
      while (true)
      {
        try {
          poller.poll(Poll.ALL_SENSORS, 0);
          show();
        } catch (InterruptedException ie) {
        }
      }
    }
  }
}